Intercourse between husband and wife is one kind of 'Ibadat in Islam. Husband and wife must enjoy each others while they have intercourse.
Below are few tips to make your wife happy during intercourse:
1. It is obligatory to do it habitually if you have no excuse (sickness, etc.)
2. Start with "Bismillah" and the authentic du'a.
Bismillâhi allâhumma jannibnash-shaytana wa jannibi shaytâna ma razaqtana.